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Observer-Based Event-Driven Control for Discrete-Time Systems With Disturbance Rejection

Jinhui Zhang,W. Zheng,Hao Xu,Yuanqing Xia

Published 2019 in IEEE Transactions on Cybernetics

ABSTRACT

In this article, the problem of disturbance rejection control is studied for discrete-time systems within an event-driven control framework. Through a predefined event-driven scheduler, both full- and reduced-order extended state observer (ESO)-based output feedback controllers are designed. With the proposed ESOs, both the disturbance and the system states are estimated, and the controllers are constructed with the estimated disturbance and states. Then, the stability and disturbance rejection analyses are conducted. It can be found that with the established event-driven control approaches, the updating frequency of the controller can be prominently reduced, and the disturbance can also be compensated in the output channels of the systems. Finally, the validity of the established control approaches is illustrated by the numerical simulations.

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